oakes



UNITED STATES PATENT OFFICE.

Y. H. OAKES, OF NEW YORK, N. Y.

` DIE-SlNKING PRESS FOR OBTINING RELIEF-PLATES FOR SURFACE-PRINTING.

Specification forming part of Letters Patent No. 41,088, dated January5, 1864.

'had to the accompanying drawings, making a part of this specification,in which- Figure 1 is a front view of the press; Fig. 2, a side view;Fig. 3, atop view; Fig. 4, a transverse vertical section.

Similar letters of reference indicate corresponding parts in all thefigures.

It will he observed that this machine consists of a table, A, upon whichis placed the plate to be stamped. B is a cross-har forming part of aslide-carriage, which sustains the pressing mechanism, and is itselfsupported by the tongues P and P, which tit and travel in grooves oneither side of the table, the motion of the whole heilig ei'ected atwill by mi ans of the stationary screw-leader L, playing into a clutch,A,in Fig. 2, on the side piece, P, which may be removed from contactwith the screw leader by loosening the jam-screw N, in case it isdesired to move the slide-carthe forwardprojection ot' the standard O,and

elevates or depresses the plunger E, on the lower end of which isfastened the tool or die formed into the device which it is desired toimpress upon 'the plate; or the tool may he held by hand against therest or guide-piece It, so as to receive the blow of the plunger E,

which will be the more convenient mode of operating the press when thereis occasion for a frequent change of tools, punches, or dies. On theunder side of the pulley is a lug or stop, H, adjustable in the circularslots (shown in Fig. 3) by means of the thumb-screw H. This stop, at acertain point in the revolution of the pulley F, strikes against thehead of the setscrew I, and thus arrests the movement ofthe pulley. Byelevating or depressing the setscrew I the pulley may be permitted tohave several revolutions, or only a part of one revolution, as may bedesired, it being obvious that the set-screw is inoperative until thepulley is screwed and lowered down so that the stop H in revolvingstrikes against the head of the set-screw I. By this means a series ofimpressions upon the plate may be made of precisely uniform depth, and,moreover, the depth is susceptible ot' the most nice and accurateregulation by means of altering the height of the setscrew, asdescribed, so that the pulley has a greater or lesser number of turns,and the plunger a corresponding extent of depression. 'Ihe pulley has anintermittent reciprocatory motion, which may be communicated to iteither by the hand or by a belt,

and it is so constructed that after having been i screwed down to makean impression it may be brought back by means of a weight attached to acord which iswound around the pulley.

.Having thus described my invention, what I cla-im as new, and desire tosecure by Let ters Patent, is-

The screw-lever or pulley F, or its equivalent, for the purpose ofdepressing the punch', tool, or die, in combination with the adjustablestop Hand set-screw I, whereby aunit'orm depth of impression is secured.

` W. H. OAKES.

Witnesses:

CHAs. MORRILL, PETER (looKE.

